Utility of Soil Classification Units in Characterizing Native Grassland Plant Communities in the Southern Plains.

gauge angles. The smaller the crossarm length, the greater the sampling radius, and when this distance becomes greater, the probability increases that the observer will underestimate the number of countable shrubs. On sagebrush and greasewood the two shorter crossarm lengths consistently underestimated cover, but on saltsage they did not. The estimates from the longest crossarm appeared to underestimate cover because of the differential in observer and plant heights. The next to the longest crossarm (4-15/64 in.) appeared to provide the best estimate of cover subject to the shrub type interaction, which tended to modify the results.